Columba,
It should not matter to any Catholic whether a modern pagan converts to the traditional Faith via R&R or SV channels. It should not matter whether the adjacent soldier in the march to reconquer Rome is R&R or SV because these differences will become moot once the target is secured.
It actually does matter who is beside you, as the R&R proponents still believe that we have a Catholic pope in some form, and they are to timid or reluctant to determine otherwise. Thus, they will not be so highly motivated to engage in direct action to rid the Church of the conciliar bandits.
It should not matter if these fighters hold allegiance to the Church higher than any attachment they feel toward their respective speculative subcategories. Operational details would be determined by the military leadership according to circuмstance. I think there are various possible strategies amenable to both R&Rs and SVs who are non-dogmatic. Special precaution must be taken to preclude violent cινιℓ ωαr between these two groups, which might otherwise break out in a situation where action had become direct.
They are more likely to tell you to wait until the Immaculate Heart sees them all to the door.
There is nothing necessarily wrong with expecting the triumph of the Immaculate Heart to bring about a solution. If biblical and Church history is any guide, it is likely that the triumph will involve some participation by the Church Militant.
However, there are some who interpret the Fatima Prophesy as license to shirk the duties of Catholic action. This sentiment was recently exemplified by Cathinfo member steelcross
here, if I am not mistaken. (Steelcross, please correct me if I am wrong.) I am no authority of theologian, but this sentiment reeks of quietist error to me and I believe it is widespread.
It reminds me of words "we should pray" that are so often said in negative response to the advocacy of action, as if prayer were not the foundation of all genuinely Catholic action, as if prayer and action were two opposite ends on a spectrum of holiness. This quietist tendency is not, strictly speaking, part of the R&R position and it may exist within both the R&R and SV camps as you perhaps indicated.
To cooperate, the core remnant must be free from the taint of quietism and non-dogmatic in their speculative (R&R/SV) positions.